package com.aiwei.tdjk.utils;

import com.google.zxing.common.BitMatrix;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;

public class MatrixToImageWriter {
	   private static final int BLACK = 0xFF000000; 
	   private static final int WHITE = 0xFFFFFFFF; 
	    
	   private MatrixToImageWriter() {} 
	    
	      
	   public static BufferedImage toBufferedImage(BitMatrix matrix) {
	     int width = matrix.getWidth(); 
	     int height = matrix.getHeight(); 
	     BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
	     for (int x = 0; x < width; x++) { 
	       for (int y = 0; y < height; y++) { 
	         image.setRGB(x, y, matrix.get(x, y) ? BLACK : WHITE); 
	       } 
	     } 
	     return image; 
	   } 
	    
	      
	   public static void writeToFile(BitMatrix matrix, String format, File file)
	       throws IOException {
	     BufferedImage image = toBufferedImage(matrix);
	     if (!ImageIO.write(image, format, file)) {
	       throw new IOException("Could not write an image of format " + format + " to " + file);
	     } 
	   } 
	    
	      
	   public static void writeToStream(BitMatrix matrix, String format, OutputStream stream)
	       throws IOException {
	     BufferedImage image = toBufferedImage(matrix);
	     if (!ImageIO.write(image, format, stream)) {
	       throw new IOException("Could not write an image of format " + format);
	     } 
	     }
	   
}
